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DeltaE is always positive when...

`DeltaE` is always positive when

A

System absorbs heat and work is done on it

B

System emits heat and work is done by it

C

System emits heat and no work is done on it

D

System absorbs heat and work is done by it

Text Solution

Verified by Experts

The correct Answer is:
A
When system absorbs heat then `q gt 0` and when work is done on the system then `w gt 0` so `Delta E = q + w gt 0`.
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ERRORLESS-THERMODYNAMICS AND THERMOCHEMISTRY-(Assertion & Reason)
  1. DeltaE is always positive when

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  2. Assertion: The enthalpy of formation of gaseous oxygen molecules at 29...

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  3. Assertion: We feel cold on touching the ice. Reason: Ice is a solid ...

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  4. Assertion: Entropy of ice is less than water. Reason: Ice has cage-lik...

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  5. Assertion: The heat absorbed during the isothermal expansion of an ide...

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  6. Assertion:Absolute values of intenal energy of substances cannot be d...

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  7. Assertion: Mass and volume are extensive properties. Reason: Mass/vo...

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  8. Assertion : Molar entropy of vaporization of water is different from e...

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  9. Assertion:The increase in internal energy(DeltaE)for the vaporiation o...

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  10. Assertion: The increase in internal energy (DeltaE) for the vaporisati...

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  11. Assertion: DeltaH and DeltaE are almost the same for the reaction. N(2...

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  12. Assertion:The enthalpies of neutralised of strong acids and strong bas...

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  13. Assertion : Zeroth law can also be termed as law of thermal equilibriu...

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  14. Assertion : For an isothermal reversible process Q = - w i.e., work do...

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  15. Assertion :- Water in liquid state is more stable than ice at room tem...

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  16. Assertion : In an isolated system the entropy increases. Reason : Th...

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  17. Assertion : For the combustion of methane, DeltaE gt DeltaH. Reason :...

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  18. (A) For reaction 2NH(3)(g)toN(2)(g)+3H(2)(g)," "DeltaHgtDeltaE (R...

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  19. Assertion:The change in entropy during melting of ice is negligible in...

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